7/30/2023 0 Comments Iceberg rolls near meThey built a water tank that measured about 8 feet (244 centimeters) long, 11.8 inches (30 cm) wide and 11.8 inches tall. They built a model of an iceberg in their laboratory. Icebergs don’t occur naturally in Chicago, so Burton and his colleagues had to find a clever way to study the ‘bergs behavior there. The iceberg will twist in the water until it too finds a stable position, with most of its bulk at the bottom. Now imagine that an unstable iceberg is like a rubber ducky that weighs seven times as much as New York’s Brooklyn Bridge. Instead, the rest of its body falls into the water, too, and the upright ducky floats to the surface. No matter how many times you try, the ducky doesn’t stay put. To understand how a glacier flips, imagine trying to float a rubber ducky on its head. In each of these cases, gravity causes an object to shift from instability to stability. A person swishing down a waterslide is unstable and doesn’t stop moving until she reaches the bottom. A balloon submerged in a pool of water is unstable and quickly floats to the surface. A dropped ball is unstable and falls toward the ground once it stops moving, it becomes stable. When an iceberg forms and plunges into the water, the block of ice may be unstable, or prone to move. The force of gravity makes an iceberg flip. water_tank_and_scientistsĪ model iceberg flips over and stirs the water in a water tank, allowing scientists to study what happens when icebergs turn over. If an iceberg flips close enough to the glacier or some other solid surface, it may shake the ground hard enough to be detected as an earthquake. “Large icebergs break off glaciers and then they flip,” says Burton. That’s when icebergs are most likely to capsize. An iceberg forms when part of the ice shelf cracks and breaks off. Where the edge of the glacier floats on water, it forms an ice shelf. In especially cold areas, like Greenland or Antarctica, glaciers may flow over the land and into the ocean. Burton and his colleagues published their results in the January 20 issue of the Journal of Geophysical Research. Such a frozen flip may even trigger an earthquake. He says an iceberg takes about three or four minutes to flip, and afterward it may send out large waves called tsunamis. “It’s easily as much energy as an atomic bomb,” says physicist Justin Burton, who designed and carried out the experiments. In recent experiments at the University of Chicago, scientists have calculated that an overturning iceberg may release as much energy as some of the most destructive events on the planet. When one of these blocks of ice flips over, it causes a great splash. Their peaks may soar hundreds of feet above the surface and large ones cover as much area as major cities. Overall he's a very interesting guy, I recommend digging a bit into his youtube channel and the documentaries made about his expeditions.Icebergs look like towering, frozen mountains that drift through water. Here's the full movie of his "Arktos" expedition Here's a shorter commented (by him) version (part 1). Here's the full movie of his expedition around the globe at latitude 0°. He acknowledged it was a very stupid idea and doesn't encourage anyone to do that kind of stunt. Here's a video where he talks about the iceberg incident. It's mainly in french but I believe there are English subtitles. The Pole2Pole expedition ended in December 2019 following the completion of Mike's Arctic crossing which brought him back to Europe, his starting point over three years after leaving the Yacht Club of Monaco in May 2016 Equipped with his exploration sailing vessel, Pangaea, Mike circumnavigated the globe from Africa to Antarctica, Oceania, Asia, the Arctic, and back to Europe. On, Mike left from his point of departure, The Yacht Club of Monaco. Mike left North Cape in Norway and went through Greenland, Canada, Alaska, Bering Strait and Russian Siberia before he reached North Cape.Īnd finally, his latest expedition "Pole2Pole", a two-year circumnavigation of the globe via the South and North Poles. It was a solitary voyage of two years and three months without motorised transport (boat, kayak, ski kite and on foot) on a 20,000 kilometres (12,000 mi) odyssey. He ALSO went around the world on the Arctic Circle solo in an expedition dubbed "Arktos". He also set off on an 18-month voyage to circle the equator on foot and by sailing, this was the first solo circumnavigation of the world around the Equator – unaided and with no engine-driven support. He crossed the South America continent solo by foot, it took him 6 months. He was the first man to travel without a dog or motorised transport to the North Pole during winter, in permanent darkness. ( Everything that follows are extracts from his Wikipedia page) Yes he's the one on the right, very famous explorer.
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